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John R. Ninosky

100 Corporate Center Drive
Suite 201
Camp Hill, PA 17011
(717) 651-3709
(717) 651-3707 - Fax

John is a member of the firm's Health Care Department. While he concentrates his practice in medical malpractice, representing correctional health care providers, health systems and physicians, John also has extensive experience in handling general liability matters. He has successfully tried cases to verdict in all three of Pennsylvania's federal courts, and in 12 county courts of common pleas. John has also participated in various types of ADR activities, including arbitrations and mediations, throughout Pennsylvania.

John partners with his clients to resolve matters as efficiently and effectively as possible. He evaluates each case with an eye toward prompt resolution, whether through ADR or trial. An experienced trial attorney, John assesses the risk of exposure and focuses on developing a persuasive story that is easily understandable for the jury. 

While attending the Dickinson School of Law, John was a member of the ATLA trial team. He was also an adjunct professor with the Advocacy Program. Prior to law school, John graduated summa cum laude from Indiana University of Pennsylvania. As an undergrad, he participated in varsity baseball and was named a three-time PSAC scholar athlete award winner. John remains active with IUP and has served as the president of the Alumni Association Board of Directors. He was the recipient of the Distinguished Alumni Award for Service in 2018.

John has been recognized by his peers for his legal ability on a number of occasions.  Specifically, he has been consistently named a Pennsylvania Super Lawyer as well as a Best Lawyers in America.  Most recently, John was recognized as the 2020 Lawyer of the Year in the practice area of Personal Injury Litigation – Defendants in Harrisburg by Best Lawyers. 

As an active member of the legal and civic communities, John is involved in various organizations. He is a member of the Dauphin and Cumberland County Bar associations, the Pennsylvania Defense Institute, and the St. Thomas More Society. John is the former Mayor of Paxtang Borough and past president of the Paxtang Borough Council. He coached youth sports through the Wilhem Paxtang Athletic Association and the St. Margaret Mary Athletic Association for a number of years.


  • Dickinson School of Law, Penn State University, Carlisle, PA (J.D., 1996)

  • Indiana University of Pennsylvania, Indiana, PA (B.A., 1993)

    Honors: summa cum laude

August 15, 2019
Marshall Dennehey is proud to announce that 25 attorneys from offices across the firm have been selected to the 2020 Edition of the Best Lawyers in America®. Among those attorneys, John Ninosky, shareholder in our Harrisburg office, was selected “Lawyer of the Year” for Defendants’ Personal Injury...
March 1, 2018
Experienced trial attorney John R. Ninosky has joined Marshall Dennehey Warner Coleman & Goggin's Harrisburg office as a shareholder in the firm's Health Care Department. Highly experienced in medical malpractice, civil rights and general liability matters, Mr. Ninosky has successfully tried...

Areas of Practice


  • Dickinson School of Law (J.D., 1996)
  • Indiana University of Pennsylvania (B.A., summa cum laude, 1993)

Bar Admissions

  • Pennsylvania, 1996
  • U.S. District Court Eastern District of Pennsylvania, 1997
  • U.S. District Court Middle District of Pennsylvania, 1997
  • U.S. Court of Appeals 3rd Circuit, 1997
  • U.S. District Court Western District of Pennsylvania, 2002
  • U.S. Supreme Court, 2002
  • West Virginia, 2013
  • U.S. District Court Southern District of West Virginia, 2013

Associations & Memberships

  • Cumberland County Bar Association
  • Dauphin County Bar Association
  • Defense Research Institute
  • Pennsylvania Defense Institute
  • St. Thomas More Society

Honors & Awards

  • Attorneys Listed by Best Lawyers in America - Litigation – Insurance and Personal Injury Litigation – Defense , 2018-Present; Harrisburg Lawyer of the Year - Insurance and Personal Injury Litigation - Defendants, 2020
  • Pennsylvania Super Lawyers Rising Star, 2010-2011
  • Pennsylvania Super Lawyers, 2014-2018

Year Joined Organization: 2018

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